WO2020043648A1 - Corps à bagues collectrices - Google Patents

Corps à bagues collectrices Download PDF

Info

Publication number
WO2020043648A1
WO2020043648A1 PCT/EP2019/072673 EP2019072673W WO2020043648A1 WO 2020043648 A1 WO2020043648 A1 WO 2020043648A1 EP 2019072673 W EP2019072673 W EP 2019072673W WO 2020043648 A1 WO2020043648 A1 WO 2020043648A1
Authority
WO
WIPO (PCT)
Prior art keywords
slip ring
recess
slip
conductor bars
ring body
Prior art date
Application number
PCT/EP2019/072673
Other languages
German (de)
English (en)
Inventor
Herbert Binder
Robert Gruber
Oliver Memminger
Manuel Oberneder
Klaus SCHIFFERER
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to ES19769023T priority Critical patent/ES2969708T3/es
Priority to EP19769023.3A priority patent/EP3830912B1/fr
Priority to CN201980056659.XA priority patent/CN113169497B/zh
Priority to US17/272,073 priority patent/US11437771B2/en
Publication of WO2020043648A1 publication Critical patent/WO2020043648A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/08—Slip-rings
    • H01R39/10—Slip-rings other than with external cylindrical contact surface, e.g. flat slip-rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/08—Slip-rings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/28—Cooling of commutators, slip-rings or brushes e.g. by ventilating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/022—Details for dynamo electric machines characterised by the materials used, e.g. ceramics
    • H01R39/025—Conductive materials

Definitions

  • the invention relates to a slip ring body for electrical contacting an asynchronous machine according to claim 1.
  • the invention relates to an electrical machine, in particular asynchronous machine, with egg nem slip ring body according to claim 8.
  • the invention relates to the use of a slip ring body for electrical contacting an asynchronous machine according to claim 9 .
  • a slip ring transmitter made of an electrically and magnetically conductive material, in particular stainless steel, is used for the current transmission.
  • the three-phase system on grinding rings and thus the rotating part of the machine is transferred via stationary brushes.
  • the three-phase system must be routed from the slip rings to the rotor winding of the rotor via appropriate conductor bars.
  • the conductor bars through which the three-phase current flows induce electrical eddy currents in adjacent, magnetically conductive materials, which in turn lead to heating of the respective components due to ohmic losses. Since the temperature of the components may not exceed certain values due to the material, it has hitherto been necessary to ensure sufficient dissipation of the heat dissipation and thus cooling of the components in question.
  • the slip ring body 1 shows an example of a slip ring body 1 according to the prior art.
  • the slip ring body comprises three slip rings 2, 3, 4 and a support ring 5.
  • the three slip rings 2, 3, 4 and a support ring 5.
  • Slip rings 2, 3, 4 are along an (imaginary)
  • Axis of rotation A arranged and have a radially inner lowing recess, which serves as a hub 6.
  • a rotor axis (not shown) of an asynchronous machine can be guided within the hub 6.
  • the individual slip rings 2, 3, 4 are in axial
  • the support ring 5 is arranged, which is connected by means of connecting means (not shown) (e.g. bolts) to the individual slip rings 2, 3, 4 and the insulating bodies 7, 8, 9, 10, around the slip ring body
  • Slip rings 4 There they are guided through corresponding (a few white) recesses 15, 16 and in turn generate heat losses there.
  • Six conductor bars 11a, 11b, 12a, 12b, 13a, 13b are guided through the support ring 5 and produce in three (in pairs) recesses 17, 18,
  • each phase of the three-phase system is routed regularly over each slip ring 2, 3, 4.
  • Slip rings can be used. These are characterized by a comparatively low magnetic conductivity, which limits the eddy current generation. However, the costs for copper are orders of magnitude higher than for stainless steel, which makes such solutions economically less attractive.
  • a slip ring body for electrical contacting an asynchronous machine is disclosed in WO 2016/165939 Al.
  • the invention has for its object to provide a grinding ring body for electrical contact to an Asyn chron machine, which avoids the previously explained after parts and is characterized above all by a low cost, both from a technical and financial viewpoint.
  • the slip ring body according to the invention comprises at least a first slip ring and a second slip ring. At least two slip rings two ladder bars attached. The at least two slip rings are rigidly connected to one another. At least one of the slip rings has at least one recess which is designed to carry out the conductor bars of the at least one other slip ring. In other words, the slip ring body is designed such that the conductor bars, which are attached to one slip ring, pass through the other slip ring. In the opposite direction, this is not the case.
  • the slip ring body according to the invention is characterized in that the at least one slip ring, which has the recess (for carrying out the conductor bars of the other slip ring), has a lower magnetic conductivity in an area around the recess than in an area in which the respective gene at least two conductor bars are attached to it, both areas are not made of copper.
  • the slip rings have a ring shape, i.e. they are hollow on the inside and have a defined ring width.
  • a conductor bar is understood to mean a rod-shaped, stromlei line, which can be designed, for example, in the form of a cylinder.
  • the conductor bars used in slip ring bodies are rigid so that they cannot twist or bend when the rotor of the asynchronous machine rotates, thereby possibly causing a short circuit.
  • the conductor bars can be made of copper, for example, without being limited to this.
  • a conductor bar can be made of copper, for example, without being limited to this.
  • Slip ring body for example, two slip rings that are spaced apart and electrically separated from each other by means of insulators. Two conductor bars are attached to one of the slip rings, and two further conductor bars are attached to the other of the two slip rings. All four conductor bars run in the same direction. So that the first two conductor bars can pass through the other slip ring, this has a special recess or bushing. In the prior art, these are generally boreholes through which the conductor bars are guided.
  • an area around the at least one recess in at least one of the slip rings has a relatively lower magnetic conductivity.
  • the low magnetic conductivity also referred to as magnetic permeability reduces the intensity of the eddy currents induced in the traversed slip rings around the conductor bars through which current flows. This can significantly reduce heat losses.
  • the ratio relates to a range of
  • Slip rings in which the associated conductor bars are fastened to them.
  • this (transition) area a high electrical conductivity is required, which is usually only cost-effective with one material which also has a high magnetic conductivity.
  • the semi-stainless steel is regularly used as the material for the slip rings or the (transition) area of the slip rings between
  • air is at least partially in the area around the recess in the slip ring.
  • air essentially refers to the natural gas mixture of the earth.
  • the recess can be expanded in such a way that the eddy currents induced by the conductor bars are significantly lower than in the “boreholes known in the prior art” ", whose opening cross section is usually only slightly larger than that of the conductor bars.
  • An opening cross-sectional area of the recess is preferably at least twice as large as a cross-sectional area of the conductor bars, particularly preferably at least four times as large.
  • the recess for the conductor bars in the slip ring is not completely closed, but instead has an interruption in which there is air a weakening of the ring-shaped magnetic field lines running around the conductor bars, which in turn reduces the formation of eddy currents and thus heat loss.
  • the lower magnetic conductivity can also be achieved by leaving out part of the area around the recess, i.e. Air is.
  • the remaining part of the slip ring in this area is realized with a lower material thickness, which in total reduces the magnetic conductivity of the area in question compared to the area around the fastenings of the conductor bars, in which the slip ring has a full material thickness.
  • the slip ring body is preferably of annular design and has an outer ring region with a higher material thickness and an inner ring area with a lower material thickness, the at least one recess in the inner ring area being angeord net.
  • the conductor bars are surrounded by an electrically insulating material in a region of the bushing through the at least one recess in the radial direction.
  • the electrically insulating material is surrounded by a material that has a comparatively high electrical conductivity.
  • the electrically highly conductive material surrounds the insulation layer and the actual conductor rod in the manner of a sleeve.
  • a sleeve is particularly preferably arranged in a radially inner region of the slip rings and surrounds a hub of the slip ring body.
  • the sleeve has a comparatively high electrical conductivity, the sleeve being made in particular of copper or aluminum.
  • the hub itself can advantageously be made of a material with a comparatively low magnetic conductivity. For more details on this, reference is made to the description of the exemplary embodiments.
  • the object is also achieved by an electrical machine, in particular an asynchronous machine, with a slip ring body in accordance with the above explanations.
  • the object is achieved by using a slip ring body in accordance with the above explanations for electrical contacting of an asynchronous machine.
  • FIG. 3 shows a slip ring body according to the invention according to a first embodiment
  • FIG. 4 shows a slip ring body according to the invention in accordance with a second embodiment
  • FIG 5 shows a support ring for the slip ring body according to the invention shown in FIG 4;
  • FIG. 6 shows a slip ring body according to the invention according to a third embodiment
  • FIG. 7 shows a slip ring body according to the invention according to a fourth embodiment
  • FIG. 8 shows a slip ring body according to the invention according to a fifth embodiment in a longitudinal section
  • FIG 9 shows the slip ring body according to FIG 8 in a cross section.
  • 3 shows a slip ring 2 of a slip ring body 1 according to the invention in an oblique view.
  • the slip ring 2 is designed as a hollow cylinder and has ventilation holes 20 distributed over its circumference, which serve for passive cooling of the slip ring 2 when the slip ring 2 is set in rotation.
  • two conductor bars 21a, 21b are fastened.
  • the attachment can be implemented with or in the slip ring 2, for example, by means of a screw connection or by pressing the conductor bars 21a, 21b.
  • the conductor bars 21a, 21b serve to transfer energy from an outside 22 of the slip ring 2 to an electrical machine, not shown, in particular an asynchronous machine.
  • the electrical energy is transmitted to the slip ring 2 via the outside 22 of the slip ring 2 by means of (not shown) brushes.
  • the slip ring 2 is made of stainless steel in the present exemplary embodiment.
  • the slip ring 2 has a recess 23 offset circumferentially from the two conductor bars 21a, 21b.
  • An opening cross-sectional area of the recess 23 is more than twice as large as a cross-sectional area of the two further conductor bars 24a, 24b. How from
  • slip ring 2 of a loop according to the invention pers 1.
  • the slip ring 2 has a recess 23 in the form of a “borehole”, the opening cross-sectional area of which is somewhat larger than a cross-sectional area of the conductor bars to be passed through it.
  • the slip ring 2 has a slot-shaped opening 25 This interrupts a wall of the recess 23 and at this point represents a local reduction in the magnetic conductivity. This weakens the magnetic field lines that arise around the conductor bars, which in turn reduces the eddy current losses.
  • a support ring 5 is shown, for example, in combination with slip rings 2 according to FIGS 3 and 4 in a slip ring body 1 who can use the.
  • the support ring 2 has three recesses 26, 27,
  • FIG. 6 shows a further alternative embodiment of a slip ring 2 of a slip ring body 1 according to the invention.
  • the slip ring 2 is designed as a hollow cylinder and has ventilation holes 20 distributed over its circumference, which serve for passive cooling of the slip ring 2 when the slip ring 2 is set in rotation.
  • the slip ring 2 has two recesses 29, 30 which are arranged on a radially inwardly projecting part 31 of the slip ring. From the two recesses 29, 30, a conductor rod 32a, 32b leads each ge.
  • the conductor bars 32a, 32b each have an internal electrically conductive core (for example made of copper) and an external, enveloping insulation Layer that surrounds the inner core. There is no material in a region around the recesses 29, 30 or the projecting part 31, so that the magnetic conductivity is greatly reduced here.
  • a plurality of slip rings 2 can be arranged, the projecting parts 31 of which are shifted relative to one another in the circumferential direction. This allows a sufficient distance from the (more than two) conductor bars 34a, 34b in a simple manner and lossy (electromagnetic)
  • FIG. 7 Another embodiment is shown in FIG 7.
  • the slip ring 2 has an outer ring region 35 and an inner ring region 36.
  • the ring areas 35, 36 are separated in FIG. 7 for illustration by means of a dashed line.
  • "Borehole-shaped" recesses 37 for carrying out conductor bars are arranged in the inner ring region 36. Areas of the slip ring 2 around the respective recesses have a lower magnetic conductivity than in an outer region 38 of the slip ring 2.
  • a material thickness of the slip ring 2 in the inner ring region 36 is less than in the outer ring region 35.
  • a material can be used for the inner ring region 35 that has a comparatively low magnetic conductivity .
  • the outer ring region 35 can be made of stainless steel and the inner ring region 36 can be made of aluminum or copper.
  • the slip ring body 1 has a first slip ring 2, a second slip ring 3, a third slip ring 4 and a support ring 5 (in FIG. 8 from left to right) seen on the right). Insulators 39, 40, 41 are attached between the slip rings 2, 3, 4 in order to electrically isolate the slip rings 2, 3, 4 from one another.
  • the conductor rod 42 extends from the first grinding ring 2 starting in the axial direction through corresponding recesses 43, 44, 45 in the other two grinding rings 3, 4 and the support ring 5 therethrough.
  • an insulation layer 46 which electrically isolates the conductor rods 42 from the surrounding parts of the slip ring body 1, in particular the slip rings 3,
  • FIG. 9 shows a front view of the slip ring 4 according to FIG. 8.
  • annular hub 50 In an inner edge region of the slip ring 4, an annular hub 50 is arranged, which consists of a material with a low magnetic conductivity.
  • An (electrical) insulation layer 51 is arranged around the hub 50. This insulation layer 51 is surrounded by a sleeve 52, which consists of a material with good electrical but low magnetic conductivity.
  • Slip ring 4 which is of course not limited to this one slip ring 4, the advantages explained with reference to FIG 8 are further enhanced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Induction Machinery (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne un corps à bagues collectrices (1) destiné à établir un contact électrique avec une machine asynchrone. Ledit corps à bagues collectrices comprend au moins une première bague collectrice (2) et une deuxième bague collectrice (3) à chacune desquelles sont fixées au moins deux barres conductrices (11a, 11b, 12a, 12b, 13a, 13b, 21a, 21b, 24a, 24b, 32a, 32b, 34a, 34b, 42). Les au moins deux bagues collectrices (2, 3) sont reliées rigidement l'une à l'autre, et l'une au moins des bagues collectrices (2, 3) comporte au moins une bague collectrice (14, 15, 16, 17, 18, 19) qui est conçue pour permettre le passage des barres conductrices (11a, 11b, 12a, 12b, 13a, 13b, 21a, 21b, 24a, 24b, 32a, 32b, 34a, 34b, 42) de l'au moins une autre bague collectrice (2, 3). Le corps à bagues collectrices (1) est caractérisé en ce que l'au moins une bague collectrice (2, 3), qui comporte au moins un évidement (14, 15, 16, 17, 18, 19, 23, 26, 27, 28, 29, 30, 37, 43, 44, 45), présente dans une région située autour de l'évidement (14, 15, 16, 17, 18, 19, 23, 26, 27, 28, 29, 30, 37, 43, 44, 45) une conductivité magnétique qui est plus faible que dans une région dans laquelle les au moins deux barres conductrices respectives (11a, 11b, 12a, 12b, 13a, 13b, 21a, 21b, 24a, 24b, 32a, 32b, 34a, 34b, 42) sont fixées à celle-ci, ou qui est destinée à venir en contact avec une brosse à transfert d'énergie, les deux régions n'étant pas en cuivre. De l'air se trouve au moins partiellement dans la région située autour de l'évidement (14, 15, 16, 17, 18, 19, 23, 26, 27, 28, 29, 30, 37, 43, 44, 45).
PCT/EP2019/072673 2018-08-27 2019-08-26 Corps à bagues collectrices WO2020043648A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES19769023T ES2969708T3 (es) 2018-08-27 2019-08-26 Cuerpo de anillo colector
EP19769023.3A EP3830912B1 (fr) 2018-08-27 2019-08-26 Corps de bague collectrices
CN201980056659.XA CN113169497B (zh) 2018-08-27 2019-08-26 滑环体
US17/272,073 US11437771B2 (en) 2018-08-27 2019-08-26 Slip ring body

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18190980.5A EP3618204A1 (fr) 2018-08-27 2018-08-27 Corps de bague collectrices
EP18190980.5 2018-08-27

Publications (1)

Publication Number Publication Date
WO2020043648A1 true WO2020043648A1 (fr) 2020-03-05

Family

ID=63407127

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/072673 WO2020043648A1 (fr) 2018-08-27 2019-08-26 Corps à bagues collectrices

Country Status (5)

Country Link
US (1) US11437771B2 (fr)
EP (2) EP3618204A1 (fr)
CN (1) CN113169497B (fr)
ES (1) ES2969708T3 (fr)
WO (1) WO2020043648A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202020101851U1 (de) 2020-04-03 2021-07-12 Walter Kraus Gmbh Drehübertrager für Hochfrequenz-Signale

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1488655A1 (de) * 1965-02-19 1969-09-04 Siemens Ag Schleifringanordnung fuer elektrische Maschinen
US3548232A (en) * 1969-08-19 1970-12-15 Eletrogeraete Vvb Collector ring units for electric motors
WO2016165939A1 (fr) 2015-04-17 2016-10-20 Siemens Aktiengesellschaft Corps de bague collectrice pour un rotor d'une machine dynamoélectrique rotative à excitation électrique
EP3145059A1 (fr) * 2015-09-21 2017-03-22 Siemens Aktiengesellschaft Cage d'ecureuil
EP3179577A1 (fr) * 2015-12-09 2017-06-14 General Electric Technology GmbH Bague collectrice à partir de matériaux différents

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1580530A (en) * 1924-07-11 1926-04-13 Westinghouse Electric & Mfg Co Detachable collector rings
US3508097A (en) * 1966-12-30 1970-04-21 Caterpillar Tractor Co Lead retaining slip ring assembly
GB1208179A (en) * 1968-12-17 1970-10-07 Ver Volkseigener Betr E Elektr Slip-ring assemblies for electrical machines
IT990806B (it) * 1973-06-28 1975-07-10 Baldoni V Presa di corrente rotante e relativo procedimento di realizzazione
EP0052385B1 (fr) * 1980-11-13 1984-06-13 BBC Aktiengesellschaft Brown, Boveri & Cie. Dispositif de bague collectrice pour machines électriques
DE10106119A1 (de) * 2001-02-08 2002-09-19 Schunk Metall & Kunststoff Stromübertragungsanordnung
JP5105838B2 (ja) * 2006-11-27 2012-12-26 株式会社牧野フライス製作所 給電装置
US9021684B2 (en) * 2011-04-19 2015-05-05 Tyco Electronics Corporation Method of fabricating a slip ring component
EP3118946B1 (fr) 2015-07-15 2017-09-13 LTN Servotechnik GmbH Collecteur rotatif et unité comprenant un collecteur rotatif

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1488655A1 (de) * 1965-02-19 1969-09-04 Siemens Ag Schleifringanordnung fuer elektrische Maschinen
US3548232A (en) * 1969-08-19 1970-12-15 Eletrogeraete Vvb Collector ring units for electric motors
WO2016165939A1 (fr) 2015-04-17 2016-10-20 Siemens Aktiengesellschaft Corps de bague collectrice pour un rotor d'une machine dynamoélectrique rotative à excitation électrique
EP3145059A1 (fr) * 2015-09-21 2017-03-22 Siemens Aktiengesellschaft Cage d'ecureuil
EP3179577A1 (fr) * 2015-12-09 2017-06-14 General Electric Technology GmbH Bague collectrice à partir de matériaux différents

Also Published As

Publication number Publication date
CN113169497B (zh) 2023-03-14
US20220094126A1 (en) 2022-03-24
EP3618204A1 (fr) 2020-03-04
EP3830912A1 (fr) 2021-06-09
CN113169497A (zh) 2021-07-23
US11437771B2 (en) 2022-09-06
ES2969708T3 (es) 2024-05-22
EP3830912B1 (fr) 2023-12-13

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